The researchers allowed female rats to self-administer heroin, and measured how much they chose to take at different times in their oestrous cycle – a regular sequence of hormone fluctuations ...

The team at the University of North Carolina Keck Medicine School assessed the oestrous cycle - equivalent to the human menstrual cycle - of mice carrying a gene mutation known to heighten the ...

Growth, puberty and sexual maturity. Reproductive cycles (oestrous cycle) in female farm animals. Oogenesis and folliculogenesis. Follicular dynamics and ovulation. Transport and survival of ...